Add a check for a PR for a listing of a tool installed by winget that is waiting to be merged in feeds packages repo

Description of the new feature / enhancement

As a user/admin/developer using winget for tool installs/upgrades

• I should be able to run Winget install or winget upgrade and install any package that is currently waiting to be published in the feed
• Clear notification that a new version of this tool is available but is not yet available via listed winget feeds due to a PR for this waiting to be merged
• Notification in this case is clear to try again later
• option to override and attempt an upgrade anyway

This would negate lots of repeated issues getting raised to partner teams (like PowerShell, vs code and 3rd party partners) where there is a wait for the PR for an updated Package to be merged and made available whether in the winget-pkgs repo or other private package feeds
Optionally should allow for a defer until available checker and this can then auto check on a regular cadence
Perhaps the above is better to be documented than implemented in the tool itself

(Could have already been raised but could not see this ask when searching the issues so apologies if this has been asked)

Proposed technical implementation details

No response

The issue names no files, tests, or entry points. First clarify whether the desired outcome is documentation or a change to winget install and upgrade behavior, then trace how feed availability is handled. Done would require an agreed scope, clear notification and retry or override behavior, and tests or documentation covering it.